Security lockbox with visual inspection window for temperature controls on swimming pool and spa heaters



FIG. 1 is a front elevational view of a security lockbox with visual inspection window for temperature controls on swimming pool and spa heaters showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top, front, and right side perspective view thereof; and,

FIG. 7 is a top, rear, and left side perspective view thereof. 

The ornamental design for a security lockbox with visual inspection window for temperature controls on swimming pool and spa heaters, as shown and described. 